Spring structure.



G. A. FRANZ. SPRING STRUCTURE.

APPLICATION FILED DEC.29. l9l6.

LEM, 15L Patented Feb. 5,1918.

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APPLICATION FILED 02c. 29. 1916.

LQWJMW Pafented Feb. 5,1918.

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GUSTAV A. FRANZ, 0F. JACKSON, MICHIGAN.

SPRING STRUCTURE.

Specification of Letters Patent.

Patented lhcb, 5, ldldl Application filed December 29, 1916. Serial Ito.139,693.

particularly adapted for car, automobile,

or other seats, beds or the like. One object is to provide a springstructure, embodying an organization of parts designed to provide forconsiderable pliability and consequent comfort in the use of the same...

Another object resides in the provis on of a spring structure whereinthe interior springs are supported on an auxlliary frame arrangedintermediate the upper and lower frames of the structure, or in anyevent,

. normally above the lower or base frame.

A still further object resides in the provision of a spring structureembodylng an auxiliary frame for the support of the mterior springs andwhich is suspended from the upper frame by a plurality of straps orother yieldable elements and whlch auxiliary frame may be furtheryieldably supported above the base frame through the 1nstrumentality ofarch springs connected thereto at the ends thereof and to the baseframe.

A still further object is to provide a spring structure embodying anopen base frame and an auxiliary frame supported normally above the baseframe for the support of springs and which and the sprlngs carriedthereby cannot be forcedthrough the open base frame upon. excessivepressure brought to bear on the structure, ncident to unusual weight orshocks and Jars, or to uneven riding.

. With the above and other objects 111 view, the present inventionconsists in the combnation and arrangement of parts hereinafter morefully described, illustrated in the accompanying drawings, andparticularly pointed out in the appended clalms, 1t being understoodthat changes may be made in the form, size, proportion and minor detailsWithout departing from the spirit or sacrificing any of the advantagesof the inven-' tion.

In the drawings; Figure 1 is a top plan view of the inventloni Fig. 2 isa bottom plan view.

Fig. 3 is a transverse sectional view.

Fig. 4 is a longitudinal sectional View.

Fig. 5 is a detail perspective view, parts being broken away, of thestrap connection between the top of the structure and the auxiliaryframe.

Referring now more particularly to the accompanying drawings, thereference char- 7 actor 20 indicates a base frame of wood, metal, orother suitable material, and which may be of any suitable form in crosssection.

Front and rear rows of springs 21 and 22 of any suitable helical orother form, are secured in any suitable manner to said base frame 20,and preferably adjacent the edges of the front and rear of the baseframe 'when the latter is of the form illustrated in the accompanyingdrawings.

An upper frame is indicated at 23. This upper frame consists preferablyof a plurality of transverse flat yieldable bands 24, connected at theirends by the longitudinal flat yieldable bands 25 and on top of whichlatter, may be secured. fiat thin yieldable wood or other strips 26. Ifthese strips 26 are employed, they are preferably connected to thestrips 25 by means of suitable fastenings 27 which also connect the bandstrips 25 to theends of the transverse bands2 l and which are alsodesigned to secure double ended clips 28 to the under side of the upperframe. These double ended clips 28 are designed to connect with theupper convolutions of the aforesaid front and rear rows of springs 21and 22, for the purpose of connecting the upper frame to said springsand supporting the upper frame yieldably thereby over the base frame.

A11 auxiliary frame A is arranged between the aforesaid upper and lowerframes. T his auxiliary, intermediate frame A may be of any suitableconstruction. As shown, it consists of flexible longitudinal strips 29to which are riveted relatively stifl" metallic transverse strips 30,the ends of the transverse strips 30 extending beyond the sides of thelongitudinal strips 29 and having their ends directed'upwardly, as at31, and outwardly, as at 32 to overlie the inner edge of the base frame.On this auxiliary frame A,

. relatively short, as compared with the aforesaid front and rear rows.of sprlngs 21 and 22. These spring 33 may be connected to said auxiliaryframe A in anysuitable mansuddenly or otherwise into engagement with thebase frame, the straps 37, being composed-of leather or similarmaterial, will ner. The springs 33 at their upper ends'are. gil\le andnot break, as would likely be the secured to the: transverse bands 24:;of the:

upper frame by means of double ended clips 34. riveted or otherwiseseeuredto the-under faces of'said transverse bands 2%. Any othersuitable means may be employed for connecting these springs 33- to theupper frame.

The auxiliary frame A may be supported between theupper and lower framesin any suitable-manners As. shown, however, the auxiliary frame A issupported above the base frame by means of arch springs 35, two

of these arch springs being shown, one'adjacent each end of theauxiliary frame.

These arch springs 35 are formed preferably 1 of yieldable band materialand secured at their ends'to the base frame by means of suitablefastenings 36 and lntermediate their ends these arch spring are rivetedor otherwise securedto the longitudinal strips 29 of the auxiliary frameA.

Straps 37 are riveted or otherwise secured to the outwardly projectingends 32 of the I transverse strips30 and to the aforesaid clips 28. bymeans of suitable .fastenings 38. These straps '37 are designed tocooperate with the arch springs 35 in maintaining the auxiliaryframe Ain normal operative position, or to' yieldably suspend the auxiliaryframe from the upper frame in cooperation with thiefarch springs 35, orif the arch springs 35 be eliminated from the structure.

In the use of the spring structure herein described, the same isexceedingly flexible or pliable. and particularly at points within the 1front and rear rows of springs 21 and 22, be-

causeofthe flexible mounting or support of the auxiliary frame A withinthe structure between the front and rear rows of'springs 2 1 'andf22 andintermediate/theupper and 7 of the structure, However, in the event ofexcess ve pressure or downward movement of the auxiliary frameA, thelatter and, the

springs which it carries, cannot be forced 60 through the baseframebecause of the fact that the outwardly proj ectingends 32 of the transverse strips 3O of the auxiliary frame .overhe thebase frame, aspreviously stated, and

therefore, in the event. of undue downward.

movement or the: auxiliary frame, it"is arcase in theuse of metallicelements for the leather straps 37 Moreover, the ends of thestraps-being thrown into engagement with the base frame instead of theauxiliary frame being thrown into direct engagementwith the base frame,noise,'incident to thecontact, is reduced, if not overcome.

hat is claimed, is:

"1. A spring structure comprising upper and lower frames, a front row ofsprings and: a rear row of springs connecting the upper and lowerframes, arch springs connected to the lower frame, an auxiliary frameconnected to the arch springs, springs connected to the auxiliary frameand to the upper-frame, and straps connected to the upper frame and theauxiliary frame.

2. A spring structure comprising upper and lower frames, a front row ofsprings and a rear row of springs connected to the frames at the frontand rear thereof, an auxiliary frame arranged intermediate the upper andlower frames, straps connect-ing the auxiliary frame with the upperframe, and springs mounted on the auxiliary frame. 3. A spring structurecomprising upper and lower frames, a front row of springs and a rear rowof springs connected to the frames at the front and rear thereof, anauxiliary frame arranged intermediate the upper and lower frames, strapsconnecting the auxiliary frame with the upper frame, springs mounted onthe auxiliaryframe, and means connected to the lower frame and theauxiliary frame to cooperate with said straps tosupport the auxiliaryframe and the springs carried thereby normally in operative position.

4; A spring structure comprising upper and lower frames, means foryieldably supporting the upper frame over the lower frame, an auxiliaryframe arranged intermediate the aforesaid frames, springs carried by theauxiliary frame, and leather strapsconnected to the auxiliary frame andthe upper frame.

5. A spring structure comprising a frame, springs mounted on said frame,another frame disposed over said first frame, springs on said secondframe, and straps secured to the second frame and depending from the topof the structure.

6. A springstructure comprising upper and lower frames, the lower framebeing open, an auxiliary frame arrangedbetween the upper and lowerframes and having portions projecting beyond its sides into overlyingrelation to the lower frame, springs between the upper and lower frames,springs carried by the auxiliary frame, and means for supporting theauxiliary frame normally in yieldable operative position.

7. A spring structure comprisng upper and lower frames, the lower framebeing open, an auxiliary frame arranged between the upper and lowerframes and having portions projecting beyond its sides into overlyingrelation to the lower frame, springs between the upper and lower frames,springs carried by the auxiliary frame, and means connected to both theupper frame and the lower frame and to the auxiliary frame to supportthe latter normally in operative position.

8. A spring structure comprising upper and lower frames, an auxiliaryframe intermediate the upper and lower frames, arch springs connected tothe lower frame and to the auxiliary frame to yieldably support thelatter and to prevent siclewise movement of the auxiliary frame, springscarried by the auxiliary frame, and elements connected to the auxiliaryframe and to the upper frame to resist downward movement of theauxiliary frame against downward pressure brought to bear upon the archsprings.

In testimony whereof I atfix my signature in the presence of twowitnesses.

, GUSTAV A. FRANZ. Witnesses:

l/VATSON E. SMITH, RALPH L. WiLoox.

topics at this patent may be obtained for five cents each, by addressingthe Man saioner at lt'atenta,

Washington, D. W

